worked for me for an old glass/mesh bottle
I have a Kovocas soda siphon from 1999 or before. I compared threads with an ISI bottle and noticed they were slightly different. However, I tried this replacement head anyway, and it worked! Note that it is not recommended, so your results may vary. It feels like a tight fit, but I can make seltzer!
Reviewed by: Charles Neuman from New York.